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Twist-free compound pendulum in spherical surface touch

A technology of spherical contact and convex spherical surface, which is applied in the field of university physics experiments, can solve problems such as the durability of twisting knife-edge contact, and achieve the effects of small friction, small damage, and improved measurement speed

Inactive Publication Date: 2014-03-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of easy torsion in double cycloid contact and poor durability of knife-edge contact, the present invention uses spherical point contact between the pendulum rod and the hanging rod

Method used

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  • Twist-free compound pendulum in spherical surface touch

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Embodiment Construction

[0009] The pendulum 1 is 500-800mm long, 15mm wide, and 5mm thick, and the material is stainless steel or aluminum alloy. On the pendulum 1, design square through holes 2 with a side length of 1cm and evenly spaced intervals, and design the side of the square through hole 2 away from the center of mass. The concave spherical surface 3 is a hemispherical surface with a diameter of 4mm. The cross-section of the hanging rod 4 is a square with a side length of 4mm. A convex spherical surface 5 is designed on the hanging rod 4. The convex spherical surface is a hemispherical surface with a diameter of 2mm. There is a supporting conical column under the hemispherical surface. The diameter of the joint with the convex spherical surface is 2mm to ensure smooth contact with the convex spherical surface. The diameter of the contact point between the support cone column and the hanging rod is 3mm to ensure good contact between the convex spherical surface 5 and the concave spherical surfa...

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PUM

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Abstract

The invention discloses a twist-free compound pendulum in spherical surface touch, relating to the physics experiments of colleges, in particular to the fabrications of twist-free compound pendulums. According to the compound pendulum in the physics laboratory of college, generally, a swinging rod touches with a hanging rod through a wire, and the compound pendulum can be frequently twisted. There is a kind of compound pendulum that a knife edge is designed on the swinging rod of the compound pendulum for touch, but with poor durability. The technical scheme of the invention is as follows: hanging holes of the swinging rod are designed into square through holes, and concave hemispherical surfaces are formed on the sides of the square through holes far away from the center of mass; and a convex hemispherical surface is formed on the hanging rod, the hemispherical surface of the hanging rod is smaller than the hemispherical surface of the swinging rod in diameter, and a conical bracket is added between the hemispherical surface and the hanging rod, thereby ensuring that the two hemispherical surfaces can touch with each other, and further ensuring that the hanging rod can touch with the swinging rod in a spherical surface point contact mode. The twist-free compound pendulum in spherical surface touch disclosed by the invention has the following beneficial effect: the compound pendulum is low in friction, less in damage, high in durability, free of twist and less in experimental regulation due to the spherical surface touch.

Description

technical field [0001] The invention relates to the field of university physics experiments, in particular to the manufacture of a twist-free compound pendulum. Background technique [0002] The pendulum and the hanging rod of the compound pendulum in the university physics laboratory are generally in line contact, and twisting often occurs due to the unevenness of the hanging rod. There is also a compound pendulum pendulum designed to form a knife edge through conical reaming, and the knife edge forms a point contact with the hanging rod. The main disadvantage is that to truly form a point contact, the knife edge should be very sharp. If the knife edge is very sharp, it will damage the hanging rod and the knife edge. By itself, the durability of the pendulum will be greatly affected. Contents of the invention [0003] In order to overcome the disadvantages of easy torsion in double cycloid contact and poor durability of knife-edge contact, the present invention adopts sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/10
Inventor 胡再国邹旭敏李娟
Owner SICHUAN UNIV
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